I can think of a few more off the top of my head (though I don't have a WP8):
Bluetooth file transfer
USB mass storage
lockscreen notifications
Data sense (I know, Verizon only at this point anyway)
offline maps
persistent Wifi
Camera lenses

I can think of a few more off the top of my head (though I don't have a WP8):
Bluetooth file transfer
USB mass storage
lockscreen notifications
Data sense (I know, Verizon only at this point anyway)
offline maps
persistent Wifi
Camera lenses

Not really an overwhelming list IMO.

I think I am missing the rooms and lock screen notifications the most.

I think I am missing the rooms and lock screen notifications the most.

How does the USB work? I did not hear of that feature of WP8.

USB is back how it was in good old Windows Mobile days. It shows as a removable drive in Windows. This allows you to see a limited folder hierarchy which allows for drag and drop of files like music, pictures, and ringtones.

Windows Phone 8 uses MTP instead of USB mass storage, with the two primary benefits being 1) no terrible partitioning and 2) storage doesn't have to be "mounted" while connected, so both the phone and the device it is connected to can access the storage. Not supported in older versions of Windows (XP without SPs and older, I believe) and OS X.

In windows 7.8, there is no option to select multiple pictures or songs for sending/deleting. You can only select a single file at a time to perform any action. I heard in windows 8 , it is possible.
Very bad that it is not there in windows 7 devices even after updating to 7.8.

An easy way to push the features of rooms would have been to add the feature to wp7 devices. But MSFT decided that ONLY people with WP8 could use rooms natively. Everyone else needs to just share one note and skydrive files. Yes, even us faithful windows users. MSFT is not going to even include us in this nice feature. Seems so simple too. It just collects things from a calendar and a few select contacts and places them into a "group". I mean seriously, how hard could it have been? Its almost identical to the people hub, but only has a few select contacts in it.